Axial Location of
More than just an interference fit is required to axially
secure the rings of locating bearings. Both rings of locating
bearings should be secured axially on both sides using appropriate
shoulders, collars, spacers and lockouts.
For non-separable bearings used as non-locating bearings only
the ring with the interference fit is axially secured. In
the majority of cases this will be the inner ring to the shaft.
The other ring must be free to move axially on its seating.
With "cross locating" bearings the rings are axially
secured on one side only.
Abutment and fillet dimensions
Shaft and housing shoulders, collars and sleeves must be dimensioned
to provide sufficient support for the bearing ring and allow
no contact between the rotating parts of the bearing and the
stationary components. The SKF General Catalogue shows the
appropriate abutment and fillet dimensions for each individual
Larger radii provide better stress distribution and are usually
required for heavily loaded shafts. In such cases a spacing
collar must be places between the inner ring and the shaft
shoulder to ensure adequate support surface for the bearing
ring. The face of the collar next to the shaft shoulder must
have a chamfer to avoid contacting the shaft fillet.
To assist with dismounting, slots can be machined in the
shaft and housing shoulders to facilitate the use of withdrawal
tools. Use the SKF oil injection method for dismounting, as
it is the easiest and quickest method.